Mill-train for the manufacture of small and medium iron bars



R. LINARD.

MILL TRAIN FOR THE MANUFACTURE OF SMALL AND MEDIUM IRON BARS.

APPLICATION FILED MAR. 22, I919.

Patented Aug. 3, 1920.

UNITED STATES PATENT OFFICE.

RAYMOND LINARD, or ouennn, BELGIUM.

MILL-TRAIN FOR THE MANUFACTURE OF SMALL AND MEDIUM IRON BARS.

Specification of Letters Patent.

Application filed March 22, 1919. Serial No. 284,386.

To all whom it may concern:

Be it known that I, RAYMOND LINARD, manufacturer, a subject of the Kingof Belgium, and resident of Ougre, in the Kingdom of Belgium, haveinvented certain new and useful Improvements in or Connected withMill-Trains for the Manufacture of Small and Medium Iron Bars; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which.it appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedtherein, which form a part of this specification.

The present invention relates to a mill train for small and medium bars.It is similar to what is called the continuous system and comprises themain advantages thereof but at the same time avoids the essentialdisadvantages of this system, which are that of being very expensive toinstall and that of only giving high efficiency for very largeproductions. Furthermore in continuous rolling mills the time necessaryfor changing the rollers for the purpose of rolling a different sectionis comparatively great, and this operation necessitates the stoppage ofthe entire plant.

The present invention, which relates to what may be called asemi-continuous train, obviates these various disadvantages.

These results are obtained by only utilizing the principle of absolutecontinuity for two consecutive rollers and by arranging between eachpair of housings of the kind either a mechanical transporter or a manwhose duty it is to insert the bar into the following rollers.

In particular the train as a Whole may comprise a pair of roughingrollers working continuously, two pairs of intermediate rollers eachworking continuously, these rollers being actuated by one and the samemotor, and finally a group of finishing rollers working continuously andactuated by a second motor.

The present invention also provides means, in the device specifiedabove, enabling a change to be made from the rolling of one section tothat of another, without any interruption of the work,

With this end in view two groups of finishing rollers may be installedinstead of one, one of the groups being arranged in such a way as to beactuated at will by one or the other of two motors.

In one particularly advantageous constructional form of the invention,with a view to being able also to change the section of the rollers ofthe second pair of intermediate rollers without stopping the work, thispair may be duplicated bya new pair of intermediate rollers actuated bythe same shafts.

In this way it is possible to change very easily the section of therollers of the pair of new rollers by unclutching it from the drivingshafts, even while the other pair of intermediate rollers is at work.

Other advantages will be seen from the explanation given hereunder,which relates to the accompanying drawing which repre sentsdiagrammatically a rolling mill according to the invention.

In a rolling mill illustrated the necessary. difference in speed betweeneach of the rollers of the two-high pairs working continuously isbrought about in a known manner because the diameters of the rollers ofthese rollers are different.

The plant comprises two motors 11 and 12. The motor 11 drives the pairof roughing rollers 1 and 2 and the shafts 13 and M which actuate, bymeans of sets of pinions 19 and 20, the pairs of intermediate rollers 4and 3, 5 and 6, 5 and 6. The motor 12 drives the shafts 15, 16 and 17,which drives the finishing rollers 7, 8 and 9.

It is to be observed that the shaft 15 which drives the finishing roller7, is arranged with respect to the shaft 14 which drives theintermediate rollers 3, 6 and 6", in such a way that a finishing roller7 can be driven at will by either one or the other of these shafts.

Without afiecting the section of any roller, it is possible to obtain bymeans of the arrangement illustrated, products rolled with two differentsections, according to the path-they have been made to traverse; inpoint of fact they may be made to pass either through the rollers 1, 2,3, 4;, 5, 6, 7 8 and 9 or else through the rollers 1, 2, 3, 4,5,6and7'.

In all cases the bars are inserted into the two-high roller 1 and passdirectly to the two-high roller 2. The bar leaving the roller 2 isengaged by means of a mechanical conveyer 10, in the roller 3, whence itpasses Patented Aug. 3, 1920.

threes. Upon leaving the twin roller 6 the bar is received by a millhand located at 21, who engages it in a continuous rolling unitconsisting of three rollers, 7, 8 and 9.

If it is desired to roll the other section, the workman located at 18,after receiving the bar leaving the roller 4, inserts it into the roller5 instead of inserting it into the roller 5. From there the bar passesdirectly into the roller 6. Upon leaving the latter it .is inserted bythe workman located at 21 in thefinishing rollers 7 driven either by theshaft 14 or by the shaft 15.

It is obvious that if the production of the roller 4 is sufficient, barsmay be inserted alternately in the rollers 5 and 5, so that this milltrain. can roll two different sections at the same time.

If it is desired to change the section of the rollers of the rollers 7all that is necessary, in order to stop this pair, while the work ofrolling goes on following the course through the rollers 1, 2, 3, 4, 5,6,7, 8 and 9, is to unclutch the rollers 7 from the shaft 14 or 15.

During. this operation, rolling can still take place through the rollers1, 2, 3, 4, 5', 6', 7., 8 and 9;

On the other hand, when the course followed is through the rollers 1, 2,3, 4, 5,6, 7 8 and 9 it will be seen that by unclutching t e rollers 5,6 and 7 the sections of their rollers can be changed at the same time.

Ifit is desired to change the section of the rollers of the roller 7,and consequently that of the rollers of the rollers 8 and 9, all that isnecessary is to stop the motor 12, render the roller 7 independent ofthe roller 7 unclutch-the said roller 7 from the shaft 14 and make thebar follow the rolling course through the rollers 1, 2, 3,4, 5', 6 and 7or else through the rollers 1, 2, 3, 4, 5, 6 and 7 It will be seen fromthe above that since the sections of the rollers of the rollers 5 and 6cannot be changed except by stopping the work of rolling they should beso chosen as only to necessitate very rare changing.

On the other hand the section of the rollers of the rollers 5' and 6 maybe changed frequently without any inconvenience. It willtherefore bethese rollers that will be utilized for the rolling of fiats'or angleIIOIIS.

The sections of the rollers of the rollers 7 7, 8 and 9 may be arrangedas desired. It is however to be noted that in the majority of plants thecourse through the rollers 1, 2, 3, 4, 5, 6, 7, 8 and 9 may be arrangedin such a way asto correspond with the current section, while the coursethrough the rollers 1, 2, 3, 4, 5, 6 and 7' may correspond with thesections that frequently vary.

It will be seen that this system of mill train only' necessitates twoworkmen, viz: one located at 18 and another at 21, itbeing understoodthat the insertion of the bars is eflected mechanically.

What I claim is:

1. A semi-continuous mill train comprising two motors, roughing rollersand intermediate rollers actuated by one of said motors, two groups offinishing rollers actuated by the second motor, one of these groups soarranged as to admit of being actuated also by the first motor.

2. A semi-continuous mill train comprising two motors, two two-high setsof roughing rollers and two pairs of intermediate rollers actuated byone of said motors, said rollers working continuously, a conveyer f forbringing the roughed bar to the first pair of intermediate rollers, andtwo groups of finishing rollers actuated by the second motor, one ofthese groups being so arranged as to admit of being also alternatelyactuated by the first motor.

3. A semi-continuous mill train comprising two motors, two, two-highsets of roughing rollers and a first and second pair of intermediaterollers actuated by one of said motors, all said rollers workingcontinuously, a conveyer for bringing the roughed bar to the first pairof intermediate rollers, another pair of intermediate rollersduplieatingthe aforesaid second pair of intermediate rollers, two groups offinishing rollers actuated by the second motor, one of these groupsbeing so arranged as to admit of being also alternately actuated by thefirst motor.

In testimony whereof I aifix my signature in presence of two witnesses.

RAYMOND LINARD. Witnesses:

LEONARD LEVEE, GEORGES VANDER HAEGHEN.

